linux-kernel - Re: [PATCH] dmaengine: shdmac: avoid unused variable warnings

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Message-ID: <2023178.SEyFnlpYZz@avalon>
Date:	Sun, 12 Apr 2015 14:45:49 +0300
From:	Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dmaengine: shdmac: avoid unused variable warnings

Hi Arnd,

Thank you for the patch.

On Saturday 11 April 2015 00:27:58 Arnd Bergmann wrote:
> This driver uses '#ifdef CONFIG_ARCH_SHMOBILE' and '#ifdef CONFIG_ARM'
> interchangeably in its sh_dmae_probe function, which causes a build
> warning when building for ARM without also enabling shmobile:
> 
> dma/sh/shdmac.c: In function sh_dmae_probe:
> dma/sh/shdmac.c:696:6: warning: unused variable errirq [-Wunused-variable]
> dma/sh/shdmac.c:695:16: warning: unused variable irqflags
> [-Wunused-variable] dma/sh/shdmac.c: At top level:
> dma/sh/shdmac.c:447:20: warning: sh_dmae_err defined but not used
> [-Wunused-function]
> 
> This changes all the #ifdef to test for CONFIG_ARCH_SHMOBILE to
> avoid that warning. An earlier patch from Laurent had fixed the warning
> for non-ARM case, but it still remained present in ARM randconfig builds.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Vinod, could you please pick the patch up ?

> Fixes: 52d6a5ee101bf ("DMA: shdma: Fix warnings due to declared but unused
> symbols") ---
>  drivers/dma/sh/shdmac.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c
> index 9f1d4c7dbab8..11707df1a689 100644
> --- a/drivers/dma/sh/shdmac.c
> +++ b/drivers/dma/sh/shdmac.c
> @@ -443,7 +443,7 @@ static bool sh_dmae_reset(struct sh_dmae_device *shdev)
>  	return ret;
>  }
> 
> -#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARM)
> +#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
>  static irqreturn_t sh_dmae_err(int irq, void *data)
>  {
>  	struct sh_dmae_device *shdev = data;
> @@ -689,7 +689,7 @@ static int sh_dmae_probe(struct platform_device *pdev)
>  	const struct sh_dmae_pdata *pdata;
>  	unsigned long chan_flag[SH_DMAE_MAX_CHANNELS] = {};
>  	int chan_irq[SH_DMAE_MAX_CHANNELS];
> -#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARM)
> +#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
>  	unsigned long irqflags = 0;
>  	int errirq;
>  #endif

-- 
Regards,

Laurent Pinchart

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